Automatically threading shuttle for looms



May 25 1926. 1,586,334

. J. A. SELF. SR

AUTOMATICALLY THREADING SHUTTLE FOR LOOMS Filed Feb. 5, 1926 m will!lllllllm 1:mMIHIMIIIIIIIUIIN fT /QNEY Patented May 25 1926.

UNITED STATES OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

PATENroFF1cE.-j

JAMES A. SELF, $3., or LYNGHBURG, VIRGINIA, ASSIGNOR rronRArER conr'onA'rIoN AUTOMATICALLY THREADI N 'G SHUTTLE FOR LOOMS. 7

Application filed February 3, 1926. Serial No 85,787.

This invention relates to automatically threading shuttles for looms and is more particularly directed to -means for controlling the thread both during threading and I the delivery of the thread during weaving.

Automatically threading shuttles are usually provided with a side delivery eye and a threading block at the front end of the shuttle, so constructed and arranged as 10 to take control of the thread on the first pick of the shuttle following replenishment and then-to cause the shuttle to become fully threaded. V

- Various forms ofsuch means have heretofore been devised, and in many instances the threading block has been provided with projections, overhangs or guards, to prevent unthreading of the shuttle once it has been threaded. One of the difficulties that arise during weaving is an engagement of the filling at the non-replenishing side of the loom by the weft fork which has a tendency to lift the thread over the top and back of the shuttle, and in many instances to cause the shuttle to become unthreaded. lhi's is particularly observable where the weft fork acts as above indicated when the shuttle is only partially threaded, as, for instance, when the shuttle is in the non-replenishing box for the first time after filling replenish ment..

One vof the objects of the present invention is to provide an automatically threading shuttle with thread controlling devices 86 so related and arranged that when the filling meets the weft fork at the non-replenishing side of the loom,the filling thread will not be disengaged or-removed from the control of said devices.

In the patent granted to Edward S. Stinipson, No. 1,488,492, February 12, 1924, an automatically threading shuttle was shown and described wherein. on the occurrence of a loop or overthrow, the filling thread would be cast upwardly out ofthe longitudinally extending thread passage, and on the following pick of the shuttle the filling would again pass into control of the devices in the shuttle, so that the latter would become threaded. The present invention is shown and described herein as. associated with a thread casting shuttle, such as in the Stimpson patent mentioned, and the invention and newcombination of parts will best be made clear from the following description and the accompanyingdrawings of one good form thereof. A

In the drawings Fig. l is a perspective view at the nonreplenishing side of the loom, showing a shuttle provided with the present invention and the weft fork acting upon the filling as the lay beats up; i a I Fig 2 is an enlarged plan view o f the threading end of the shuttle; and

Flg. 3 is a perspective viewof thethreading'block containing thepresent invention.

The shuttle 1 comprises, a body portion having the bobbin chamber 2 in which the bobbin or filling'carrier 3 is supported, as. usual, it being understood that thebobbin 3 carr estlie filling a wound thereon. In this type of shuttle, of course, the bottom of the shuttle is open usually for the ejection of a filling carrier when replenishment is to be effected. i A

The shuttle body 1 infront of the bobbin chamber 1s provided with a threading block receiving chamber 4 in which is secured the threading block 5 which is provided with the longitudinally extending thread passage 6. The threading block 5, also, has a bridge 7- at the'forward portionof the longitudinally extending thread passage about which the thread passes on itsway to the sidedeiilvery eye 8 formed in the side of the shut- In explanation of the invention, the thread casting shuttle ofthe'Stimpson patent above mentioned is selected, wherein the longitudinally extending thread passage 6 is provided with a threadcasting device 9, which "as shown in Fig. 3, may comprisea main scroll having its thread casting edge portlon 10 extending upwardly, laterally at 11 and frontwardly,as at 12 so that on the occurrence of a loop or overthrow, when the A shuttle is arrested in the filling replenishing box, the thread will be cast upwardly from the longitudinally extending thread passage. As indicated in Fig. 2, it will be noted that the main scroll or thread casting device 9 islocated in the thread passage rearward of the side delivery eye, and in these respects the construction may be substantially the same as that in the Stimpson patent.

Thethreading blockis provided with the apron 13 which extends over the side delivery eye 8. and itsfforwardly extending edge portion 14 is supported from the adjacent edge portion 15 of the shuttle wood which is cut away transversely of the shuttle atthis point-to form a passage for the filling thread to the side delivery eye when the shuttle is being fully threaded. These two parts may also be related substantially as heretofore.

At the forward portion of the longitndinally extending thread passage the thread ing'block 5 is provided with an auxiliary scroll 16, which has the same spiral scroll form as the main scroll 9, although usually the auxiliary scroll 16 may not be so large as the main scroll.

Communicating with the front portion of the longitudinally extending thread passage 6, the wood of the shuttleis cut away to form a thread leader 17 in which the thread may lead on the first pick following replenislr ment as the lay goes back or is in its substantially rearward position. The thread leader 17 contains a friction pad 18, and the auxiliary scroll 16 has its end portion 19 extending t-oand turned laterally over the pad 18, while the side wall 20 of the auxiliary scroll is closely adjacent to the side wall 21 of the thread leader.

From the construction thus far described, it will be apparent that the present inven tion in one aspect contemplates an automatically-threading shuttle having a longitudinally extending thread passage, a main scroll in the thread passage rearward of the side delivery eye and preferably formed to cast the thread upwardly out of the thread passage on the occurrence of a loop or overthrow, and that it further contemplates the provision of an auxiliary scroll located at the other end portion of the longitudinally extendingthread passage frontward of the side delivery eye, and also preferably formed as a thread casting scroll similar to the main thread casting scroll. The auxiliary scroll 16 has its thread casting edge portion 22 extended laterally and downwardly and frontwardly relative to the longitudinally extending thread passage, while the terminal end portion 19 of the scroll exten'dswell intothe thread leader or passageway 17 formed in the wood of the shuttle.

From the construction indicated in Fig. 3, it will be noted that the main scroll 9 and the auxiliary scroll 16 are in somewhat different planes, that is, the auxiliary scrollextending thread passage to release or cast the front portion of the thread. On the following pick, as the shuttle passes to the non-replenishing side of the loom, the thread will again pass into control of the main and auxiliary scrolls 9 and 16, due to the swirling action of the thread, and the shuttle will then be partially threaded.

When the shuttle is thus in the non-rcplenishing box and the lay beats up, the weft fork which may be of usual construction and mounted for tilting movement upon the weft fork slide 24:, will meet the filling or thread a and as the lay heats up will push it back relatively to the lay, as indicated in Fig. 1. At such times the filling will ride over the top wall 21 of the thread leader and the auxiliary scroll 16, the end 19 of which turns frontwardly and laterally away from the wall 21, will retain the filling from disengagement from the scroll, so that the shuttle will remain fully threaded. In other words, the auxiliary scroll 16 acts when the shuttle is in the nonreplenishing box to prevent complete unthreading of the shuttle by the weft fork, and acts when the shuttle goes into the replenishing box as an auxiliary thread casting device, and then as the shuttle goes out of the replenishing box after replenishment, it acts with the swirl of the thread to take control and effect, in conjunction with the main scroll, partial threading of the shuttle, which is completed on the return of the shuttle to the replenishing box.

The weft fork 28 pivotally supported on the weft fork slide 24 may be of usual con struction and a frontwardly extending loop may be constructed for engagement with the hook 26 of the arm 27 should the weft fork not be tilted by the filling, but since the details of these matters form no part of the present invention and are now well understood in the art, further description thereof appears unnecessary.

The auxiliary scroll 16 may conveniently be formed as a part separate from the threading block 5 and in such case it will be secured to the threading block, as indicated in Fig. 3, or it might be associated with the threading block in other ways, the details of the connection between the two being of no importance.

lVhat is claimed is:

1. An automatically threading loom shuttle having a side delivery eye and a longitudinally extending thread passage, a main scroll mounted in the thread passage rearward of the side delivery eye, and an auxiliary scroll mounted at the front of the thread passage frontward of the side delivery eye to control the delivery of thread from the shuttle during weaving.

2. An automatically threading loom shuttle having a side delivery eyeand a threading block provided with a longitudinally extending thread passage, a main scroll lo- 1 2: an auxiliary scroll located at the front of the longitudinally extending thread passage forward of the side delivery eye. 7 q

3. An automatically threading loom shuttle having a side delivery eye and a longitudinally extending thread passage, a thread leader formed in the shuttle body and communicating with the thread passage, a main scroll located in the longitudinally extending thread passage rearward of the side delivery eye, and an auxiliary scroll at the front of the thread passage frontward of the side delivery eye,the leading end of the scroll being extended into the thread leader.

4. An automatically threading loom shuttle having a side delivery eye and alongitudinally extending thread passage, a thread leader formed in the shuttle body and communicating with the thread passage, a main scroll located in the longitudinally extending thread passage rearward of the side delivery eye, an auxiliary scroll at the front of the thread passage frontward of the side delivery eye, the leading end of the scroll being extended into the thread leader, and a pad located in the thread leader beneath the forward end of the auxiliary scroll. V g 5. An automatically threading loom shuttle having a side delivery eye and a threading block provided with a longitudinally extendlng thread passage, a main scroll located in the thread passage between the bobbin chamber and side delivery eye, an auxiliary scroll located at thefront of the longitudinally extending thread passage forward of the side delivery eye above the horizontal plane passing through the lengthwise axis of the main scroll.

6. In an automatically threading shuttle for looms, the combination 7 of the shuttle body having a side delivery eye and a thread leader formed in the shuttle wood and extending towards the end of the shuttle, a threading block having ,a longitudinally extending thread passage, a main scroll inthe thread passage rearward of the side delivery eye, an auxiliary scroll frontward of the side I the longitudinally extending thread passage as the main scroll, said auxiliary scroll hav ing its terminal end portion located in the thread leader and extending laterally towards the side delivery eye of the shuttle.

7. In an automatically threading shuttle for looms, the combination of the shuttle body having a bobbin chamber, alongitudinally extending thread passage'and a side delivery eye, two thread casting devices in the longitudinally extending thread passage to cast the thread therefrom 011 the occurrence of a loop or overthrow as the shuttle is arrestedin the shuttle box, one casting de- Vice being in the rear portion of the thread passage adjacent the bobbin chamber and theother casting device being at the forward end of the thread passage.

8. In an automatically threading shuttle for looms, the combination of the shuttle body having a bobbin chamber, a longitudinallyv extending thread passage and a side delivery eye, two thread casting devices in the longitudinally extending thread passage to castthe thread therefrom on the occurrence of aloop 0r overthrow as the shuttle is arrested in the shuttle box, one casting device being in the rear portion of the thread passage and the other casting device being at the forward end of the thread passage and formed as a scroll the leading end of which prevents the weft fork from lifting the thread out of the thread passage when the shuttle is partially unthreaded.

9. An automatically threading loom shuttle having a'longitudinally extending thread passage and side delivery eye, a main thread casting scroll in the rear portion of the thread passage having its thread casting edge extending upwardly, laterally, and frontwardly from a point adjacent the bobbin chamber, and an auxiliary thread cast-- ing scroll at the forward portion of the threadpassage having its thread casting edge extending upwardly, laterally, and

frontwardlyfrom a point in front of the main thread castingscrollr In testimony whereof, I'have signed my name to this specification.

JAMES A. SELF, sR.

delivery eye'and located at the same side of g 

